| Pseuderanthemum pihuamoense T.F. Daniel, 1984 |
| Pseuderanthemum praecox (Benth.) Leonard, 1941 |
| Pseuderanthemum standleyi Leonard, 1938 |
| Pseuderanthemum verapazense Donn. Sm., 1909 |
| Razisea Oerst., 1855 |
| Razisea spicata Oerst., 1855 |
| Rhytiglossa Nees ex Lindl., 1836 |
| Rhytiglossa breviflora Nees, 1847 |
| Rhytiglossa candelariae Oerst., 1855 |
| Rhytiglossa hyssopus Nees, 1847 |
| Rhytiglossa inaequalis (Benth.) Nees, 1847 |
| Rhytiglossa mexicana Oerst., 1855 |
| Rhytiglossa ovatifolia Oerst., 1855 |
| Rhytiglossa pectoralis (Jacq.) Nees, 1845 |
| Ruellia L., 1753 |
| Ruellia abbreviata D.N. Gibson, 1972 |
| Ruellia albicaulis Bertero, 1825 |
| Ruellia albiflora Fernald, 1897 |
| Ruellia alboviolacea Lindau, 1904 |
| Ruellia amoena Sessé & Moc., 1889 |